US3250259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling rate of temperature changes of heat generators during startup and shutdown
Assignee: Sulzer AG
•
Filing: 1963-06-21
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Granted: 1966-05-10
•
Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Profos Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:17
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR STARTING UP OR SHUTTING DOWN A HEAT EXCHANGER INCLUDING A MAIN FLUID MEDIUM FLOW CHANNEL HAVING A RATE OF TEMPERATURE CHANGE-SENSITIVE BOUNDARY SURFACE AND A BYPASS CHANNEL CONNECTION INTO SAID MAIN CHANNEL UPSTREAM AND DOWNSTREAM OF SAID SURFACE TO PROVIDE A CHANNEL IN PARALLEL THEREWITH, SAID PROCESS COMPRISING THE STEPS OF MEASURING THE TIME RATE OF CHANGE OF TEMPERATURE OF SAID SURFACE, AND VARYING IN OPPOSITE SENSED THE RELATIVE RATES OF FLOW IN SAID MAIN AND PARALLEL CHANNELS UPON TRANSGRESSION BY SAID RATE OF A LIMITING VALUE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR STARTING UP OR SHUTTING DOWN A HEAT EXCHANGER INCLUDING A MAIN FLUID MEDIUM FLOW CHANNEL HAVING A RATE OF TEMPERATURE CHANGE-SENSITIVE BOUNDARY SURFACE AND A BYPASS CHANNEL CONNECTION INTO SAID MAIN CHANNEL UPSTREAM AND DOWNSTREAM OF SAID SURFACE TO PROVIDE A CHANNEL IN PARALLEL THEREWITH, SAID PROCESS COMPRISING THE STEPS OF MEASURING THE TIME RATE OF CHANGE OF TEMPERATURE OF SAID SURFACE, AND VARYING IN OPPOSITE SENSED THE RELATIVE RATES OF FLOW IN SAID MAIN AND PARALLEL CHANNELS UPON TRANSGRESSION BY SAID RATE OF A LIMITING VALUE.
References Cited (Backward Citations)
US3102513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |